Exhibit 99.1

FOR IMMEDIATE RELEASE

Plains All American Pipeline, L.P. and Plains GP Holdings Report First-Quarter 2014 Results

(Houston — May 7, 2014) Plains All American Pipeline, L.P. (NYSE: PAA) and Plains GP Holdings (NYSE: PAGP) today reported first-quarter 2014 results, with PAA’s results exceeding the midpoint of its quarterly guidance range. PAA’s first-quarter 2014 results reflect continued growth in its fee-based Transportation and Facilities segments driven by execution of PAA’s expansion capital program.  These results also include solid performance from PAA’s Supply and Logistics segment as a result of constructive crude oil and NGL market conditions, however, such conditions were not as favorable as those experienced in the first quarter of 2013.

Plains All American Pipeline

Summary Financial Information (1)

(in millions, except per unit data)

(1)   The Partnership’s reported results include the impact of items that affect comparability between reporting periods. The impact of certain of these items is excluded from adjusted results.  See the section of this release entitled “Non-GAAP Financial Measures and Selected Items Impacting Comparability” and the tables attached hereto for information regarding certain selected items that the Partnership believes impact comparability of financial results between reporting periods, as well as for information regarding non-GAAP financial measures (such as adjusted EBITDA) and their reconciliation to the most directly comparable GAAP measures.

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“PAA reported first-quarter results that exceeded the midpoint of our adjusted EBITDA guidance by over $40 million,” said Greg L. Armstrong, Chairman and CEO of Plains All American.  “Solid performance from our crude oil and natural gas liquids activities was partially offset by weather-related impacts in our natural gas storage and crude oil rail activities.

PAA and PAGP are on track to achieve their respective distribution growth objectives of 10% and 25% for 2014.  PAA’s quarterly distribution of $0.6300 per unit to be paid next week represents a 9.6% increase over the comparable distribution paid in May 2013, and PAGP’s quarterly distribution of $0.17055 per share represents a 14.4% increase over the initial quarterly distribution included in its October 2013 initial public offering (“IPO”) prospectus. Importantly, we continue to execute on our expansion capital program, which we believe will set the stage for continued, attractive distribution growth beyond 2014.

Additionally, we are well positioned to not only fund our ongoing capital programs, but also pursue acquisition-oriented growth opportunities as we ended the first quarter with a strong balance sheet, credit metrics favorable to our targets and $2.0 billion of committed liquidity.”

The following table summarizes selected PAA financial information by segment for the first quarter of 2014:

Summary of Selected Financial Data by Segment (1)

(in millions)

(1)   The Partnership’s reported results include the impact of items that affect comparability between reporting periods. The impact of certain of these items is excluded from adjusted results. See the section of this release entitled “Non-GAAP Financial Measures and Selected Items Impacting Comparability” and the tables attached hereto for information regarding certain selected items that the Partnership believes impact comparability of financial results between reporting periods.

(2)   Certain of our non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

First-quarter 2014 Transportation adjusted segment profit increased 22% versus comparable 2013 results. This increase was primarily driven by higher crude oil pipeline volumes associated with recently completed organic growth projects and increased producer drilling activities, partially offset by the sale of our refined products pipelines in 2013.

First-quarter 2014 Facilities adjusted segment profit increased 2% over comparable 2013 results.  This slight increase was primarily due to increased profitability from our NGL fractionation and natural gas processing activities, partially offset by weather-related impacts in our natural gas storage operations.

First-quarter 2014 Supply and Logistics adjusted segment profit exceeded the high end of our guidance, but decreased by approximately 52% relative to comparable 2013 results. This decrease was primarily a result of less favorable crude oil market conditions in the first quarter of 2014 compared to the 2013 period and reduced earnings from our natural gas storage commercial optimization activities due to severe cold weather during the first quarter of 2014.

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Plains GP Holdings

PAGP’s sole assets are its ownership interest in PAA’s general partner and incentive distribution rights.  As the control entity of PAA, PAGP consolidates PAA’s results into its financial statements, which is reflected in the condensed consolidating balance sheet and income statement included at the end of this release.  Information regarding PAGP’s distributions is reflected below:

Summary Financial Information

(1)  Reflects a full fourth quarter 2013 distribution per Class A share (before proration), assuming PAGP’s ownership in AAP at the date of record for the distribution for the full fourth quarter of 2013.

Conference Call

PAA and PAGP will hold a conference call on May 8, 2014 (see details below).  Prior to this conference call, PAA will furnish a current report on Form 8-K, which will include material in this news release as well as PAA’s financial and operational guidance for the second quarter and full year of 2014.  A copy of the Form 8-K will be available at www.plainsallamerican.com, where PAA and PAGP routinely post important information.

The PAA and PAGP conference call will be held at 11:00 a.m. EDT on Thursday, May 8, 2014 to discuss the following items:

1.              PAA’s first-quarter 2014 performance;

2.              The status of major expansion projects;

3.              Capitalization and liquidity;

4.              Financial and operating guidance for the second quarter and full year of 2014; and

5.              PAA’s and PAGP’s outlook for the future.

Conference Call Access Instructions

To access the Internet webcast of the conference call, please go to www.plainsallamerican.com, choose “Investor Relations,” and then choose “Events and Presentations.”  Following the live webcast, the call will be archived for a period of sixty (60) days on the website.

Alternatively, access to the live conference call is available by dialing toll free (800) 230-1059. International callers should dial (612) 332-0107.  No password is required.  The slide presentation accompanying the conference call will be available a few minutes prior to the call under the “Events and Presentations” portion of the “Investor Relations” section of the website at www.plainsallamerican.com.

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Telephonic Replay Instructions

To listen to a telephonic replay of the conference call, please dial (800) 475-6701, or (320) 365-3844 for international callers, and enter replay access code 323381.  The replay will be available beginning Thursday, May 8, 2014, at approximately 1:00 p.m. EDT and will continue until 11:59 p.m. EDT on June 8, 2014.

Non-GAAP Financial Measures and Selected Items Impacting Comparability

To supplement our financial information presented in accordance with GAAP, management uses additional measures that are known as “non-GAAP financial measures” (such as adjusted EBITDA and implied distributable cash flow) in its evaluation of past performance and prospects for the future. Management believes that the presentation of such additional financial measures provides useful information to investors regarding our performance and results of operations because these measures, when used in conjunction with related GAAP financial measures, (i) provide additional information about our core operating performance and ability to generate and distribute cash flow, (ii) provide investors with the financial analytical framework upon which management bases financial, operational, compensation and planning decisions and (iii) present measurements that investors, rating agencies and debt holders have indicated are useful in assessing us and our results of operations. These measures may exclude, for example, (i) charges for obligations that are expected to be settled with the issuance of equity instruments, (ii) the mark-to-market of derivative instruments that are related to underlying activities in another period (or the reversal of such adjustments from a prior period), (iii) items that are not indicative of our core operating results and business outlook and/or (iv) other items that we believe should be excluded in understanding our core operating performance. We have defined all such items as “selected items impacting comparability.”  We consider an understanding of these selected items impacting comparability to be material to the evaluation of our operating results and prospects.

Although we present selected items that we consider in evaluating our performance, you should also be aware that the items presented do not represent all items that affect comparability between the periods presented. Variations in our operating results are also caused by changes in volumes, prices, exchange rates, mechanical interruptions, acquisitions and numerous other factors. These types of variations are not separately identified in this release, but will be discussed, as applicable, in management’s discussion and analysis of operating results in our Quarterly Report on Form 10-Q.

Adjusted EBITDA and other non-GAAP financial measures are reconciled to the most comparable GAAP measures for the periods presented in the tables attached to this release, and should be viewed in addition to, and not in lieu of, our consolidated financial statements and notes thereto. In addition, PAA maintains on its website (www.plainsallamerican.com) a reconciliation of adjusted EBITDA and certain commonly used non-GAAP financial information to the most comparable GAAP measures. To access the information, investors should click on “Plains All American Pipeline, L.P.” under the “Investor Relations” link on the home page, select the “Guidance & Non-GAAP Reconciliations” link and navigate to the “Non-GAAP Reconciliations” tab.

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Forward Looking Statements

Except for the historical information contained herein, the matters discussed in this release are forward-looking statements that involve certain risks and uncertainties that could cause actual results to differ materially from results anticipated in the forward-looking statements. These risks and uncertainties include, among other things, failure to implement or capitalize, or delays in implementing or capitalizing, on planned internal growth projects; unanticipated changes in crude oil market structure, grade differentials and volatility (or lack thereof); environmental liabilities or events that are not covered by an indemnity, insurance or existing reserves; declines in the volumes of crude oil, refined product and NGL shipped, processed, purchased, stored, fractionated and/or gathered at or through the use of our facilities, whether due to declines in production from existing oil and gas reserves, failure to develop or slowdown in the development of additional oil and gas reserves or other factors; fluctuations in refinery capacity in areas supplied by our mainlines and other factors affecting demand for various grades of crude oil, refined products and natural gas and resulting changes in pricing conditions or transportation throughput requirements; the occurrence of a natural disaster, catastrophe, terrorist attack or other event, including attacks on our electronic and computer systems; tightened capital markets or other factors that increase our cost of capital or limit our access to capital;  maintenance of our credit rating and ability to receive open credit from our suppliers and trade counterparties; continued creditworthiness of, and performance by, our counterparties, including financial institutions and trading companies with which we do business; the currency exchange rate of the Canadian dollar; the availability of, and our ability to consummate, acquisition or combination opportunities; the successful integration and future performance of acquired assets or businesses and the risks associated with operating in lines of business that are distinct and separate from our historical operations; weather interference with business operations or project construction, including the impact of extreme weather events or conditions; the effectiveness of our risk management activities; shortages or cost increases of supplies, materials or labor; our ability to obtain debt or equity financing on satisfactory terms to fund additional acquisitions, expansion projects, working capital requirements and the repayment or refinancing of indebtedness; the impact of current and future laws, rulings, governmental regulations, accounting standards and statements and related interpretations; non-utilization of our assets and facilities; the effects of competition; increased costs or lack of availability of insurance; fluctuations in the debt and equity markets, including the price of our units at the time of vesting under our long-term incentive plans; risks related to the development and operation of our facilities, including our ability to satisfy our contractual obligations to our customers at our facilities; factors affecting demand for natural gas and natural gas storage services and rates; general economic, market or business conditions and the amplification of other risks caused by volatile financial markets, capital constraints and pervasive liquidity concerns; and other factors and uncertainties inherent in the transportation, storage, terminalling and marketing of crude oil and refined products, as well as in the storage of natural gas and the processing, transportation, fractionation, storage and marketing of natural gas liquids discussed in the Partnerships’ filings with the Securities and Exchange Commission.

Plains All American Pipeline, L.P. is a publicly traded master limited partnership that owns and operates midstream energy infrastructure and provides logistics services for crude oil, natural gas liquids (“NGL”), natural gas and refined products. PAA owns an extensive network of pipeline transportation, terminalling, storage and gathering assets in key crude oil and NGL producing basins and transportation corridors and at major market hubs in the United States and Canada. On average, PAA handles over 3.5 million barrels per day of crude oil and NGL on its pipelines. PAA is headquartered in Houston, Texas.

Plains GP Holdings (NYSE: PAGP) is a publicly traded entity that owns an interest in the general partner and incentive distribution rights of Plains All American Pipeline, L.P., one of the largest energy infrastructure and logistics companies in North America.  PAGP is headquartered in Houston, Texas.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in millions, except per unit data)

ADJUSTED RESULTS

(in millions, except per unit data)

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEET DATA

(in millions)

DEBT CAPITALIZATION RATIOS

(in millions)

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

SELECTED FINANCIAL DATA BY SEGMENT

(in millions)

(1)  Includes intersegment amounts.

(2)  Segment general and administrative expenses (G&A) reflect direct costs attributable to each segment and an allocation of other expenses to the segments. The proportional allocations by segment require judgment by management and are based on the business activities that exist during each period.

(3)  Certain non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

OPERATING DATA (1)

(1)  Volumes associated with assets employed through acquisitions and internal growth projects represent total volumes (attributable to our interest) for the number of days or months we employed the assets divided by the number of days or months in the period.

(2)  Facilities total is calculated as the sum of: (i) crude oil, refined products and NGL terminalling and storage capacity; (ii) rail load and unload volumes multiplied by the number of days in the period and divided by the number of months in the period; (iii) natural gas storage capacity divided by 6 to account for the 6:1 mcf of gas to crude Btu equivalent ratio and further   divided by 1,000 to convert to monthly volumes in millions; and (iv) NGL fractionation volumes multiplied by the number of days in the period and divided by the number of months in the period.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

COMPUTATION OF BASIC AND DILUTED EARNINGS PER LIMITED PARTNER UNIT

(in millions, except per unit data)

(1)  We calculate net income available to limited partners based on the distributions pertaining to the current period’s net income.  After adjusting for the appropriate period’s distributions, the remaining undistributed earnings or excess distributions over earnings, if any, are allocated to the general partner, limited partners and participating securities in accordance with the contractual terms of the partnership agreement and as further prescribed under the two-class method.

(2)  Our Long-term Incentive Plan (“LTIP”) awards that contemplate the issuance of common units are considered dilutive unless (i) vesting occurs only upon the satisfaction of a performance condition and (ii) that performance condition has yet to be satisfied. LTIP awards that are deemed to be dilutive are reduced by a hypothetical unit repurchase based on the remaining unamortized fair value, as prescribed by the treasury stock method in guidance issued by the FASB.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

SELECTED ITEMS IMPACTING COMPARABILITY

(in millions, except per unit data)

(1)  Certain of our non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

(2)  Includes mark-to-market gains and losses resulting from derivative instruments that are related to underlying activities in future periods or the reversal of mark-to-market gains and losses from the prior period, net of inventory valuation adjustments, as applicable.

(3)  Equity-indexed compensation expense above excludes the portion of equity-indexed compensation expense represented by grants under LTIP that, pursuant to the terms of the grant, will be settled in cash only and have no impact on diluted units.

(4)  Includes other immaterial selected items impacting comparability, as well as the noncontrolling interests’ portion of selected items.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

COMPUTATION OF ADJUSTED BASIC AND DILUTED EARNINGS PER LIMITED PARTNER UNIT

(in millions, except per unit data)

(1)  Certain of our non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

(2)  We calculate adjusted net income available to limited partners based on the distributions pertaining to the current period’s net income.  After adjusting for the appropriate period’s distributions, the remaining undistributed earnings or excess distributions over earnings, if any, are allocated to the general partner, limited partners and participating securities in accordance with the contractual terms of the partnership agreement and as further prescribed under the two-class method.

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PLAINS ALL AMERICAN PIPELINE, L.P. AND SUBSIDIARIES

FINANCIAL DATA RECONCILIATIONS

(in millions)

(1)  Certain of our non-GAAP financial measures may not be impacted by each of the selected items impacting comparability.

(1)  Includes distributions that pertain to the current period’s net income, which are paid in the subsequent period.

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PLAINS GP HOLDINGS AND SUBSIDIARIES

CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS

(in millions, except per share data)